- { "version", 0, NULL, 'V' }, { "help", 0, NULL, 'h' },
- { "verbose", 0, NULL, 'v' }, { "viewer", 1, NULL, 'e' },
- { "extract", 1, NULL, 'x' }, { "list-options", 0, NULL, OPT_DUMP_OPTIONS },
- { NULL, 0, NULL, 0 },
+ { "version", 0, nullptr, 'V' }, { "help", 0, nullptr, 'h' },
+ { "verbose", 0, nullptr, 'v' }, { "viewer", 1, nullptr, 'e' },
+ { "extract", 1, nullptr, 'x' }, { "list-options", 0, nullptr, OPT_DUMP_OPTIONS },
+ { nullptr, 0, nullptr, 0 },